Improvement in revolving fire-arms



WITNESSES,-

I. JOHNSON & MLBYE. Revolving Fire-Arm.

No. 204,438.- Patented June 4,1878.

UNITED S ATES PATENT OFFICE.

IVER JOHNSON AND MARTIN BYE,.OI VVOROESTER, MASSACHUSETTS.

IMPROVEMENT IN REVOLVING. FlRE -ARMS.

Specification forming part of Letters Patent No. 204,435, dated June 4, 1878 application filed February 8, 1 878.

To all whom it may concern:

Be it known that we, IVER JoHNsoN and MARTIN BYE, both of the city and county of Worcester, State of Massachusetts, have invented a new and useful Improvement in Bevolving Fire-Arms, of which the following is a specification:

Our invention, though applicable to various forms of fire-arms, relates more particularly to that class of revolvers known as havinga double act-ion, or as capable of being fired repeatedl'y by merely pulling the trigger, like selfcockers, or by cooking by means of the hammer, in the usual way, at the option of the operator. v

In this class of fire-arms as heretofore made, the hammer does not have the same amount of motion when cooked or fired by the trigger that it does when cocked-by the hammer,

(usually only about one-half.) Consequently the cylinder is not rotated as far in one case as in the other, which is objectionable, and is over come by our invention, which gives the hammer the same motion when fired either way,

. and simplifies the parts that give motion to the cylinder, and provides for the unlocking and locking of the cylinder by a simple and effective arrangement.

In the accompanying drawmgs, Figure 1.

shows a side view of a revolver embodying our invention, with some portions of the case removed and the parts in position of rest, or with the hammer held a little oif'the cartridge in the cylinder. Fig. 2 is the same with the parts at full-cock, or as nearly released for firing. Fig. 3 shows a rear view of the triggem-extension and its pivoted lever.

The same letters indicate the same parts wherever they occur.

A is the cylinder, having a ratchet at its rear end and stop-notches, as shown. B is the hammer. C is a stirrup, pivoted to B, its upper end fitting against BF, and preventing any more outward motion of its lower end than as shown, the spring-a allowing its lower end to move slightly toward. B to pass the head D of the trigger E as the latter returns to place after firing. F is the stop-lever, havinga spring to hold its forward end up into the notches in the cylinder A, and a tail whereby a camlever, G, when pressed forward by the lower part of the hammer, releases said stop-lever from the cylinder, the lever G being pivoted in a slot in the extension of the trigger E, as shown in Fig. 3, allowing it to pass the stop.- lever F after firing. H is a tilting lever with catch on its rearend, holding the hammer at half-cock by notch b, and at full cock by notch d, its fore end extending over-the rear of the trigger E, to be raised to release the catch in the act of firing. L is a slotted lever, its rear end resting on a pin, M,-

in a slot, and a spring, N, pressing it forward, the other end being pointed, and fitting into the ratchet on the end of cylinder A. O is a pin or stud in the tumbler of hammer B, so situated below its pivot I as to give the proper motion to L, in a slot of which it worke to move the cylinder A one division at every full motion of the hammer, and on the return of the hammer thespring N allows the piece L to pass the next notch of the ratchet. The

lever G is curved on its front to allow the] stop-lever to press against the cylinder in time to arrest it when fired quickly. By this construction we. simplify the parts, and give a sure equal motion both to the cylinder and hammer in firing, whether it be done by the trigger alone or cooked first by the hammer.

By a slight variation of the notch d or the I catch on H it may be made to release exactly at the timethe head D slips from the stirrup O, or a little before or after that time, if de sired. We prefer a little before as the best time.

.Y The other parts of the fire-arm not described may be of the usual form and construction, with such slight modifications as will adapt them to our invention We are aware that double-acting revolvers havev been. made as shown in Patent'No.

are not operated by hammer 13, substantially as and hand or automatically by apullon the trigger, for the purposes described. as set forth.

3. In a self-cooking revolver,-the combina- 4. In a revolver the combinationof the camtion of a self-firing mechanism, consisting of lever G, operated by the hammer B, and a cylthe trigger-head D, acting on the stirrup O, inder stop mechanism,substantially as and for pivoted to the hammer B, and an equal-mothe purposes set forth. tioned full-cocking mechanism, consisting of the tilting lever Il, holding by the full-cock notch d, and released by the rear of the trigger 1*], so that the hammer will be released at or about the samepoint, whether cooked by IVER JOHNSON. MARTIN BYE.

Witnesses:

NAHUM M. I). HAYWARD,

JAS. G. ARNOLD. 

